Ryobi Grinder SGL1150 User Guide

OPERATOR'S MANUAL  
4-1/2 in. (115 mm) Angle Grinder  
Model SGL1150 / Double Insulated  
SPECIFICATIONS:  
Grinding Wheel Capacity  
Spindle Thread Size  
Rating  
4-1/2 in. (115 mm)  
5/8-11 UNC  
120 volts, 60 Hz, AC  
11,000 RPM  
No Load Speed  
Amperes  
6.6 Amperes  
Net Weight  
4.0 lbs. (1.8 kg.)  
THANK YOU FOR BUYING A RYOBI ANGLE GRINDER.  
YournewanglegrinderhasbeenengineeredandmanufacturedtoRyobi'shighstandardfordependability, easeofoperation,  
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.  
CAUTION: Carefully read through this entire operator's manual before using your new angle grinder.  
Pay close attention to the Rules for Safe Operation, Warnings, and Cautions. If you use your grinder properly and only for  
what it is intended, you will enjoy years of safe, reliable service.  
Please fill out and return the Warranty Registration Card so that we can be of future service to you.  
Thank you again for buying Ryobi tools.  
SAVE THIS MANUAL FOR FUTURE REFERENCE  
 
GENERAL SAFETY RULES  
gloves away from moving parts. Loose clothes, jew-  
elry, or long hair can be caught in moving parts.  
WARNING:  
Avoid accidental starting. Be sure switch is off be-  
fore plugging in. Carrying tools with your finger on the  
switch or plugging in tools that have the switch on in-  
vites accidents.  
Read and understand all instructions. Failure to  
follow all instructions listed below, may result in elec-  
tric shock, fire and/or serious personal injury.  
Remove adjusting keys or wrenches before turning  
the tool on. A wrench or a key that is left attached to a  
rotating part of the tool may result in personal injury.  
SAVE THESE INSTRUCTIONS  
Work Area  
Do not overreach. Keep proper footing and balance  
at all times. Proper footing and balance enables better  
control of the tool in unexpected situations.  
Keep your work area clean and well lit. Cluttered  
benches and dark areas invite accidents.  
Do not operate power tools in explosive atmo-  
spheres, such as in the presence of flammable liq-  
uids, gases, or dust. Power tools create sparks which  
may ignite the dust or fumes.  
Use safety equipment. Always wear eye protection.  
Dust mask, nonskid safety shoes, hard hat, or hearing  
protection must be used for appropriate conditions.  
Tool Use and Care  
Keep bystanders, children, and visitors away while  
operating a power tool. Distractions can cause you to  
lose control.  
Use clamps or other practical way to secure and  
support the workpiece to a stable platform. Holding  
the work by hand or against your body is unstable and  
may lead to loss of control.  
Electrical Safety  
Double insulated tools are equipped with a polar-  
ized plug (one blade is wider than the other.) This  
plug will fit in a polarized outlet only one way. If the  
plug does not fit fully in the outlet, reverse the plug.  
If it still does not fit, contact a qualified electrician to  
install a polarized outlet. Do not change the plug in  
Do not force tool. Use the correct tool for your appli-  
cation. The correct tool will do the job better and safer  
at the rate for which it is designed.  
Do not use tool if switch does not turn it on or off.  
Any tool that cannot be controlled with the switch is dan-  
gerous and must be repaired.  
any way. Double insulation  
eliminates the need for  
Disconnect the plug from the power source before  
making any adjustments, changing accessories, or  
storing the tool. Such preventive safety measures re-  
duce risk of starting the tool accidentally.  
the three wire grounded power cord and grounded power  
supply system.  
Avoid body contact with grounded surfaces such as  
pipes, radiators, ranges and refrigerators. There is  
an increased risk of electric shock if your body is  
grounded.  
Store idle tools out of reach of children and other  
untrained persons. Tools are dangerous in the hands  
of untrained users.  
Do not expose power tools to rain or wet conditions.  
Water entering a power tool will increase the risk of elec-  
tric shock.  
Maintain tools with care. Keep cutting tools sharp  
and clean. Properly maintained tools with sharp cutting  
edges are less likely to bind and are easier to control.  
Do not abuse the cord. Never use the cord to carry  
the tools or pull the plug from an outlet. Keep cord  
away from heat, oil, sharp edges or moving parts.  
Replace damaged cords immediately. Damaged cords  
increase the risk of electric shock.  
Check for misalignment or binding of moving parts,  
breakage of parts, and any other condition that may  
affect the tool's operation. If damaged, have the tool  
serviced before using. Many accidents are caused by  
poorly maintained tools.  
When operating a power tool outside, use an out-  
door extension cord marked “W-A” or “W”. These  
cords are rated for outdoor use and reduce the risk of  
electric shock.  
Use only accessories that are recommended by the  
manufacturer for your model. Accessories that may  
be suitable for one tool, may become hazardous when  
used on another tool.  
Personal Safety  
Service  
Stay alert, watch what you are doing and use com-  
mon sense when operating a power tool. Do not use  
tool while tired or under the influence of drugs, al-  
cohol, or medication. A moment of inattention while  
operating power tools may result in serious personal in-  
jury.  
Tool service must be performed only by qualified  
repair personnel. Service or maintenance performed  
by unqualified personnel could result in a risk of injury.  
When servicing a tool, use only identical replace-  
ment parts. Follow instructions in Maintenance sec-  
tion of this manual. Use of unauthorized parts or fail-  
ure to follow Maintenance Instructions may create a risk  
of electric shock or injury.  
Dress properly. Do not wear loose clothing or jew-  
elry. Contain long hair. Keep your hair, clothing, and  
Page 3  
 
RULES FOR SAFE OPERATION  
recommended for an extension cord 100 feet or less  
Specific Safety Rules for Grinders  
Always use proper guard with grinding wheel. A  
guard protects operator from broken wheel fragments.  
in length. A cord exceeding 100 feet is not recom-  
mended. If in doubt, use the next heavier gage. The  
smaller the gage number, the heavier the cord. An  
undersizedcordwillcauseadropinlinevoltageresulting  
in loss of power and overheating.  
Accessories must be rated for at least the speed  
recommended on the tool warning label. Wheels and  
other accessories running over rated speed can fly apart  
and cause injury.  
Inspect for and remove all foreign objects from  
workpiece before grinding. Following this rule will  
reduce the risk of serious personal injury.  
Hold tool by insulated gripping surfaces when per-  
forming an operation where the tool may contact  
hidden wiring or its own cord. Contact with a “live”  
wire will make exposed metal parts of the tool “live” and  
shock the operator.  
Drugs, Alcohol, Medication. Do not operate tool  
while under the influence of drugs, alcohol, or any  
medication. Following this rule will reduce the risk of  
electric shock, fire, or serious injury.  
Additional Rules for Safe Operation  
Know your power tool. Read operator's manual  
carefully. Learn its applications and limitations as  
well as the specific potential hazards related to this  
tool. Following this rule will reduce the risk of electric  
shock, fire, or serious injury.  
Keep hands away from grinding area. Following this  
rule will reduce the risk of serious personal injury.  
Save these instructions. Refer to them frequently  
and use them to instruct others who may use this  
tool. If you loan someone this tool, loan them these  
instructions also.  
Always wear safety glasses. Everyday eyeglasses  
have only impact resistant lenses; they are NOT  
safetyglasses. Followingthisrulewillreducetheriskof  
serious personal injury.  
WARNING:  
Some dust created by power sanding, sawing, grinding,  
drilling, and other construction activities contains  
chemicals known to cause cancer, birth defects or  
other reproductive harm. Some examples of these  
chemicals are:  
Protect your lungs. Wear a face or dust mask if the  
operation is dusty. Following this rule will reduce the  
risk of serious personal injury.  
Protect your hearing. Wear hearing protection dur-  
ing extended periods of operation. Following this rule  
will reduce the risk of serious personal injury.  
• lead from lead-based paints,  
Inspect tool cords periodically and if damaged,  
have repaired at your nearest authorized service  
center. Stay constantly aware of cord location. Fol-  
lowing this rule will reduce the risk of electric shock or  
fire.  
• crystalline silica from bricks and cement and other  
masonry products, and  
• arsenic and chromium from chemically-treated  
lumber.  
Checkdamagedparts. Beforefurtheruseofthetool,  
a guard or other part that is damaged should be  
carefully checked to determine that it will operate  
properly and perform its intended function. Check  
for alignment of moving parts, binding of moving  
parts, breakage of parts, mounting, and any other  
conditions that may affect its operation. A guard or  
other part that is damaged should be properly re-  
paired or replaced by an authorized service center.  
Following this rule will reduce the risk of electric shock,  
fire, or serious injury.  
Your risk from these exposures varies, depending on  
how often you do this type of work. To reduce your  
exposure to these chemicals: work in a well ventilated  
area, and work with approved safety equipment, such  
as those dust masks that are specially designed to filter  
out microscopic particles.  
Do not abuse cord. Never carry tool by cord or yank  
it to disconnect from receptacle. Keep cord from  
heat, oil and sharp edges. Following this rule will  
reduce the risk of electric shock or fire.  
Make sure your extension cord is in good condition.  
When using an extension cord, be sure to use one  
heavy enough to carry the current your product will  
draw. A wire gage size (A.W.G.) of at least 16 is  
SAVE THESE INSTRUCTIONS  
Page 4  
 
SYMBOLS  
Important: Some of the following symbols may be used on your tool. Please study them and learn their meaning.  
Proper interpretation of these symbols will allow you to operate the tool better and safer.  
SYMBOL  
NAME  
DESIGNATION/EXPLANATION  
V
Volts  
Voltage  
A
Amperes  
Hertz  
Current  
Hz  
W
min  
Frequency (cycles per second)  
Watt  
Power  
Minutes  
Alternating Current  
Time  
Type or a characteristic of current  
n
No Load Speed  
Rotational speed, at no load  
0
Class II Construction  
Designates Double Insulated  
Construction tools  
.../min  
Revolutions or Reciprocation Per Minute  
Safety Alert Symbol  
Revolutions, strokes,  
surface speed, orbits etc. per minute  
Indicates danger, warning or caution.  
It means attention!!! Your safety is  
involved.  
FEATURES  
DEFINITIONS  
A)  
B)  
C)  
DANGER: Failure to obey a safety warning will result in serious injury to yourself or to others. Always  
follow the safety precautions to reduce the risk of fire, electric shock and personal injury.  
WARNING: Failure to obey a safety warning can result in serious injury to yourself or to others. Always  
follow the safety precautions to reduce the risk of fire, electric shock and personal injury.  
CAUTION: Failure to obey a safety warning may result in property damage or personal injury to yourself  
or to others. Always follow the safety precautions to reduce the risk of fire, electric shock and personal  
injury.  
D)  
NOTE: Advisesyouofinformationorinstructionsvitaltotheoperationormaintenanceoftheequipment.  
Page 5  
 
RULES FOR SAFE OPERATION FOR GRINDERS  
Grinding wheel and guard must be securely  
Never cover the air vents in the motor housing  
attached as described in this operating manual  
with your hands while operating the grinder.  
before connecting the grinder to a power source.  
Hold the tool away from your body while it is  
running. Keep your hands away from the abrasive  
attachments.  
Grinding wheels must be stored in a dry place.  
Before attaching the grinding wheel, inspect it for  
visible defects. If cracked, chipped, or warped, do  
not install it.  
Dust and waste materials should not be allowed to  
build up in the workshop. Hot metal sparks could  
start a fire.  
Do not overtighten the clamp nut on the grinding  
wheel. Excessive tightening can cause the wheel  
to crack during operation  
Do not remove the soft paper in the center of the  
grinding wheel. NOTE: If this paper has been  
previously removed, insert some soft rubber or  
paper between the grinding wheel and disc flange.  
Make sure that the guard is in good condition and  
securely installed before operating grinder.  
Do not enlarge or alter the center hole of the  
Do not clamp the grinder in a vise or use as a fixed  
grinding wheel as this could result in breaking it.  
grinder.  
Use only the normal grinder surface. Never use  
Never turn on the grinder with the grinding wheel  
the side or upper surfaces for cutting.  
or any rotating parts touching the workpiece.  
KEEP THE TOOL AND ITS HANDLE DRY,  
CLEAN, AND FREE FROM OIL AND GREASE.  
Always use a clean cloth when cleaning. Never  
use brake fluids, gasoline, petroleum-based  
products, or any strong solvents to clean your tool.  
Use only grinding wheels in compliance with ANSI  
standard B7.1 and rated greater than 11,000 rpm.  
Do not use the grinder if the disc flange or clamp  
nut is missing or if the spindle is bent.  
Always hold the grinder securely with two hands  
while working and at all times when it is running.  
UNPACKING  
With the exception of the side handle and grinding wheel,  
youranglegrinderhasbeenshippedcompletelyassembled.  
PACKING LIST  
Angle Grinder With Guard  
Grinding Wheel  
Carefully remove the grinder and accessories from the  
box. Make sure that all items listed in the packing list are  
included.  
Side Handle  
Wrench  
Inspect grinder carefully to make sure no breakage or  
Operator's Manual  
Warranty Registration Card  
damage has occurred during shipping.  
If any parts are damaged or missing, contact your nearest  
Ryobi dealer to obtain replacement parts before  
attempting to operate grinder.  
Do not discard the packing material until you have  
WARNING:  
carefully inspected and satisfactorily operated grinder.  
If any parts are missing, do not operate your grinder until  
the missing parts are replaced. Failure to do so could  
result in possible serious personal injury.  
WARNING:  
The operation of any grinder can result in foreign objects being thrown into your eyes,  
which can result in severe eye damage. Before beginning power tool operation, always  
wear safety goggles or safety glasses with side shields and a full face shield when  
needed. We recommend Wide Vision Safety Mask for use over eyeglasses or standard  
safety glasses with side shields.  
Page 6  
 
FEATURES  
KNOW YOUR ANGLE GRINDER  
TRIGGER SWITCH WITH LOCK-ON FEATURE  
Before attempting to use your grinder, familiarize yourself  
with all operating features and safety requirements.  
See Figure 1.  
Yourgrinderhasaconvenientlylocatedtriggerswitch. Italso  
has a lock-on feature that allows the grinder to be locked in  
the on position when continuous operation for extended  
periods of time is required.  
Makesureallgrindingwheels andrecommendedaccessories  
are in accordance with listed specifications for this tool. For  
example, do not use grinding wheels that are rated at less  
SPINDLE LOCK BUTTON  
The spindle lock button secures the spindle so that only one  
wrench is needed to change the grinding wheel.  
than 11,000 RPM.  
HEAVY DUTY MOTOR  
SIDE HANDLE  
Your Ryobi SGL1150 Angle Grinder has a powerful motor,  
with sufficient power to handle tough grinding jobs that  
require heavy duty performance.  
The side handle provided, stabilizes your grinder and must  
be used during all grinding operations. In addition to  
maintaining safe control during use, the side handle also  
provides convenient ease of operation for the operator.  
GUARD  
A protective guard has been provided on your grinder. It  
deflects sparks and metal chips during use.  
APPLICATIONS  
(Use only for the purposes listed below)  
Grinding metals.  
Preparing surfaces to be welded.  
Grinding welds.  
SPINDLE  
LOCK BUTTON  
LOCK-ON  
BUTTON  
TRIGGER SWITCH  
SIDE HANDLE  
GUARD  
GRINDING WHEEL  
Fig. 1  
ELECTRICAL CONNECTION  
Your grinder has a precision built electric motor. It should  
be connected to a power supply that is 120 volts, 60 Hz,  
AC only (normal household current). Do not operate  
this tool on direct current (DC). A substantial voltage drop  
will cause a loss of power and the motor will overheat. If  
your tool does not operate when plugged into an outlet,  
WARNING:  
Do not allow familiarity with your grinder to make you  
careless. Remember that a careless fraction of a second  
is sufficient to inflict severe injury.  
double-check the power supply.  
Page 7  
 
ADJUSTMENTS  
WARNING:  
Your grinder should never be connected to power supply  
when you are assembling parts, making adjustments,  
installingorremovinggrindingwheels,orwhennotinuse.  
Disconnectingyourgrinderwillpreventaccidentalstarting  
that could cause serious injury.  
GEAR  
HOUSING  
INSTALLING THE SIDE HANDLE  
See Figure 2.  
UNPLUG YOUR GRINDER.  
SIDE  
HANDLE  
WARNING:  
Fig. 2  
Failure to unplug your grinder could result in accidental  
starting causing serious injury.  
TO  
TIGHTEN  
Install the side handle by screwing it into the side of the  
WRENCH  
gear housing.  
NOTE: The handle can be installed on either the left or  
right side of the grinder, depending on operator prefer-  
ence. It must always be used to prevent loss of control  
and possible serious injury.  
TO  
LOOSEN  
CLAMP  
NUT  
Tighten side handle securely.  
GRINDING  
WHEEL  
INSTALLING THE GRINDING WHEEL  
See Figure 3.  
UNPLUG YOUR GRINDER.  
DISC  
FLANGE  
WARNING:  
Failure to unplug your grinder could result in accidental  
starting causing serious injury.  
Your grinder is shipped with the disc flange and clamp  
SPINDLE  
nut attached to the spindle.  
Depress spindle lock button and rotate clamp nut until  
spindle locks.  
Loosen and remove clamp nut from spindle. Do not  
remove disc flange.  
FLAT(S)  
SPINDLE  
LOCK BUTTON  
Make sure flats on the bottom of disc flange are engaged  
with flats on spindle.  
Fig. 3  
Place the grinding wheel over the spindle with the  
concave side of the wheel facing up.  
Thread the clamp nut on the spindle with the flat side of  
the nut facing up. Fit the raised, small diameter portion  
of the clamp nut into the hole in the grinding wheel and  
finger tighten.  
WARNING:  
Always install grinding wheel with the depressed center  
against the disc flange as shown in figure 3. Failure to do  
so will cause the grinding wheel to crack when tightening  
the clamp nut. This could result in serious personal injury  
because of loose particles breaking off and being thrown  
from the grinder.  
Depress the spindle lock button and rotate the wheel  
clockwise until the spindle locks in position.  
Securely tighten the clamp nut with the wrench provided.  
Page 8  
 
ADJUSTMENTS  
A
WARNING:  
Before connecting your grinder to power supply, always  
check to be sure switch is not in lock-on position. Failure  
to do so could result in accidental starting of your grinder  
resulting in possible serious injury.  
GUARD LOCATION  
The guard on your grinder should be correctly installed  
depending on which side the handle is mounted. Never use  
your grinder without the guard correctly in place. Fig-  
ures 4-6 show correct and incorrect locations of the guard.  
CORRECT  
LOCATION OF GUARD IS  
Fig. 4  
BETWEEN POINTS A AND B  
WARNING:  
B
Never place the guard so that it is on front of the grinder as  
showninfigure6. Thiscouldresultinseriousinjurybecause  
sparks and loose particles thrown from the grinding wheel  
would be directed toward the operator. Always place the  
guard in the correct location as shown in figures 4 and 5.  
OPERATION  
WARNING:  
Fig. 5  
Always wear safety glasses and keep guard in place  
when grinding.  
Hot metal sparks from metal grinding can cause a fire.  
Avoid spark contact with flammable materials such as  
saw dust, or clothing.  
INCORRECT  
LOCATION OF GUARD  
Grinding wheels must be free of fissures and cracks.  
Fissures and cracks can cause a grinding wheel to  
shatter, resulting in possible serious injury.  
Thoroughly inspect a new grinding wheel before it is  
installed on the grinder:  
1. Use a wooden hammer for the inspection.  
2. Using the hammer, lightly tap all around the wheel,  
carefully listening to the resulting sounds.  
3. Any places with fissures or cracks will result in a  
different sound.  
Do not use a wheel containing fissures or cracks.  
When installing a new grinding wheel, a no load  
revolution test of approximately one minute must be  
carried out with the grinding wheel facing a safe  
direction, i.e. away from people or objects.  
Fig. 6  
WARNING:  
Do not attempt to operate this tool until you have read  
thoroughly and understand completely all instructions,  
safety rules, etc. contained in this manual. Failure to  
comply can result in accidents involving fire, electric  
shock, or serious personal injury. Save operator's manual  
and review frequently for continuing safe operation, and  
instructing others who may use this tool.  
DANGER:  
Never attach a wood cutting or carving blade of any  
type to this angle grinder. It is only designed for  
grinding metal. Use for any other purpose is not  
recommended and creates a hazard which will result in  
serious injury.  
Page 9  
 
OPERATION  
CAUTION:  
Never cover air vents. They must always be open for  
proper motor cooling.  
SWITCH  
See Figure 7.  
To turn your grinder ON, depress the switch trigger. Release  
the switch trigger to turn your grinder OFF.  
LOCK-ON FEATURE  
See Figure 7.  
LOCK-ON  
BUTTON  
Your grinder has a lock-on feature that is convenient when  
continuousoperationforextendedperiodsoftimeisrequired.  
Tolock-on,depressthetriggerswitch,pushinthelockbutton  
located on the side of the handle, then while holding the lock  
button pushed in, release the trigger. To release the lock,  
depress the trigger switch and release it.  
TRIGGER SWITCH  
Fig. 7  
GRINDING  
See Figure 8.  
Always carefully select and use grinding wheels that are  
recommended for the material to be ground. Make sure that  
the minimum operating speed of the grinding wheel selected  
isnotlessthan11,000rpm.Thegrindingwheelprovidedwith  
your grinder is suitable for grinding welds, preparing sur-  
faces to be welded, grinding structural steel, and grinding  
stainless steel.  
5° TO 15°  
Secure all work before beginning a grinding operation.  
Secure small workpieces in a vise or clamp to a workbench.  
Fig. 8  
workpiece. Start your grinder and let the motor and grinding  
wheel build up to full speed. Gradually lower grinder until the  
grinding wheel contacts the workpiece.  
DANGER:  
Never use your grinder with the guard removed. It has  
been designed for use only with the guard installed.  
Attempting to use grinder with guard removed will result  
in loose particles being thrown against the operator  
resulting in serious personal injury.  
For best results keep the grinder tilted at an angle from 5 to  
15 degrees and continuously moving at a steady, consistent  
pace. Move the grinder back and forth or up and down over  
the work area. Keep the grinder moving so that an excessive  
amount of material is not removed from one area. If the  
grinder is held in one spot too long, it will gouge and cut  
grooves in the workpiece. If the grinder is held at too sharp  
an angle, it will also gouge the workpiece because of  
concentration of pressure on a small area.  
WARNING:  
Never use your grinder without wearing eye protection.  
Following this rule will reduce the risk of serious personal  
injury.  
Usejustenoughpressuretokeepthegrinderfromchattering  
or bouncing. Heavy pressure will decrease its speed and put  
a strain on the motor. Normally the weight of the tool alone  
is adequate for most grinding jobs. Use light pressure when  
grinding jagged edges or loose bolts where there is the  
potential for the grinder to snag on the metal edge.  
The key to efficient operation begins by controlling the  
pressure and surface contact between the grinding wheel  
and workpiece. Flat surfaces are ground at an acute angle,  
normally between 5 to 15 degrees.  
Lift the grinder away from the workpiece before turning your  
grinder off.  
Formaximumcontrol, holdthegrinderinfrontandawayfrom  
you with both hands, keeping the grinding wheel clear of the  
Page 10  
 
MAINTENANCE  
WARNING:  
When servicing use only identical Ryobi replacement parts. Use of any other parts may create a hazard or cause product  
damage.  
GUARD REPLACEMENT  
See Figure 9.  
TO  
TIGHTEN  
After extended use, the guard may become worn and need  
WRENCH  
adjustments or replacing. If you drop your grinder and  
damage the guard it may also be necessary for you to  
replace it.  
CLAMP  
NUT  
TO  
LOOSEN  
PROCEED AS FOLLOWS WHEN REPLACEMENT IS  
REQUIRED:  
GRINDING  
WHEEL  
UNPLUG YOUR GRINDER.  
WARNING:  
Failure to unplug your grinder could result in accidental  
starting causing serious injury.  
Remove and reassemble parts as shown in figure 9.  
DISC  
FLANGE  
GUARD  
Depress spindle lock button and rotate clamp nut until  
spindle locks.  
Using the wrench provided, loosen and remove clamp  
CLAMP  
nut from spindle.  
Remove grinding wheel and disc flange.  
CLAMP  
SCREW  
Using a screwdriver, loosen the clamp screw until the  
guard can be adjusted or removed.  
If you are making adjustments, rotate the guard to its  
correct position as shown in figures 4, 5, and 9, then  
retighten clamp screw securely. Never use your grinder  
without the guard in place and properly adjusted.  
See Figures 4 and 5.  
SPINDLE  
BEARING CAP  
If you are replacing the guard, loosen the clamp screw  
until the guard and clamp can be removed from the  
bearing cap.  
FLAT(S)  
SPINDLE  
LOCK BUTTON  
Fig. 9  
Place the new guard and clamp on the shoulder of the  
bearing cap. See Figure 9.  
NOTE: If the new guard and clamp will not fit, loosen the  
clamp screw until they slide over the bearing cap.  
Rotate guard to the correct position as shown in figure 9.  
Tighten clamp screw securely.  
Reassemble disc flange, grinding wheel, and clamp nut.  
Refer to "INSTALLING THE GRINDING WHEEL" in-  
structions on page 8.  
Securely tighten the clamp nut with the wrench pro-  
vided.  
Page 11  
 
MAINTENANCE  
GENERAL  
WARNING:  
Always wear safety goggles or safety glasses with side  
shieldsduringpowertooloperationorwhenblowingdust.  
If operation is dusty, also wear a dust mask.  
Avoidusingsolventswhencleaningplasticparts.Mostplastics  
are susceptible to damage from various types of commercial  
solvents and may be damaged by their use. Use clean cloths  
to remove dirt, carbon dust, etc.  
WARNING:  
Do not at any time let brake fluids, gasoline, petroleum-  
based products, penetrating oils, etc. come in contact  
with plastic parts. They contain chemicals that can  
damage, weaken, or destroy plastic.  
LUBRICATION  
All of the bearings in this tool are lubricated with a sufficient  
amount of high grade lubricant for the life of the unit under  
normaloperatingconditions. Therefore,nofurtherlubrication  
is required.  
DOUBLE INSULATION  
IMPORTANT  
Double insulation is a concept in safety, in electric power  
tools, which eliminates the need for the usual three-wire  
grounded power cord. All exposed metal parts are isolated  
from the internal metal motor components with protecting  
insulation.Doubleinsulatedtoolsdonotneedtobegrounded.  
Servicing of a tool with double insulation requires extreme  
care and knowledge of the system and should be performed  
onlybyaqualifiedservicetechnician.Forservicewesuggest  
you return the tool to your nearest RYOBI AUTHORIZED  
SERVICE CENTER for repair. When servicing use only  
identical Ryobi replacement parts.  
WARNING:  
The double insulated system is intended to protect the  
user from shock resulting from a break in the tool's  
internal wiring. Observe all normal safety precautions  
related to avoiding electrical shock.  
Page 12  
 
OPERATOR'S MANUAL  
4-1/2 in. (115 mm) Angle Grinder  
Model SGL1150 / Double Insulated  
**Ampere rating  
(on tool data plate) 0-2.0  
EXTENSION CORD CAUTION  
2.1-3.4 3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0  
When using a power tool at a considerable distance from a power  
source, be sure to use an extension cord that has the capacity to  
handlethecurrentthetoolwilldraw. Anundersizedcordwillcause  
a drop in line voltage, resulting in overheating and loss of power.  
Use the chart to determine the minimum wire size required in an  
extension cord. Only round jacketed cords should be used.  
Cord Length  
Wire Size (A.W.G.)  
25'  
50'  
16  
16  
16  
16  
16  
16  
16  
16  
14  
16  
14  
12  
14  
14  
10  
14  
12  
100'  
When working with a tool outdoors, use an extension cord that is  
designed for outside use. This is indicated by the letters "WA" on  
the cord's jacket.  
CAUTION: Keep the extension cord clear of the working  
area. Position the cord so that it will not get caught on workpiece,  
tools, or other obstructions while you are working with a power  
tool.  
Before using any extension cord, inspect it for loose or exposed  
wires and cut or worn insulation.  
**Used on 12 gauge - 20 amp circuit.  
• SERVICE  
Now that you have purchased your tool, should a need ever exist for repair parts or service,  
simply contact your nearest Ryobi Authorized Service Center. Be sure to provide all  
pertinent facts when you call or visit. Please call 1-800-525-2579 for your nearest Ryobi  
complete list of Authorized Service Centers.  
• MODEL NO.  
The model number of your tool will be found on a plate attached to the motor housing.  
Please record the model number and serial number in the space provided below.  
MODEL NUMBER  
SERIAL NUMBER  
SGL1150  
RYOBI TECHNOLOGIES, INC.  
1428 Pearman Dairy Road Anderson SC 29625  
Post Office Box 1207 Anderson SC 29622  
Phone 1-800-525-2579  
972000-700  
6-01  
 

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